Investment casting automatic shell production line

Abstract

The present invention discloses an automatic shell-making production line for investment casting, belonging to the field of investment casting technology. The production line includes a wax pattern manufacturing area, a slurry dipping area, and a warm water dewaxing area, which are sequentially connected by a conveyor belt. The warm water dewaxing area is connected to a wax collection assembly. The wax collection assembly includes a box body, a partition is provided in the middle of the box body, and the partition separates the wax collection box into an upper wax collection area and a lower hot water area. A recovery chamber is provided in the middle of the wax collection area. The open side of the recovery chamber is provided with an opening, and the bottom of the recovery chamber is provided with a leakage hole connected to the hot water area. A condensing plate is provided at the opening, and the condensing plate is connected to a rotary drive device. The rotary drive device can drive the condensing plate to move between a condensing position and a scraping position. A scraping assembly is provided in the middle of the recovery chamber. The scraping assembly can scrape wax off the surface of the condensing plate at the scraping position. The production line of the present invention can conveniently collect casting wax in the shell-making production line to save wax.

Description

Technical Field

[0001] The invention belongs to the technical field of investment casting, and in particular relates to an automatic shell-making production line for investment casting. Background Art

[0002] Investment casting, also known as lost wax casting, involves creating a wax pattern of the part to be cast. The wax pattern is then coated with a slurry, creating a clay mold. After the clay mold is dried, it's fired to create a ceramic mold. Once fired or boiled, the wax melts away, leaving only the ceramic mold. The clay mold typically includes a pouring port, through which molten metal is poured. After cooling, the desired part is created. Investment casting is suitable for producing small parts with complex shapes, high precision requirements, or that are difficult to process. Existing investment casting processes are mostly suitable for single parts. One of the difficulties of assembly line casting is collecting wax patterns. Precision casting wax, a specialized material used to create part molds in investment casting, is a crucial factor in determining casting quality. Most existing casting wax is imported. Failure to properly collect and utilize this wax can severely impact the operation of investment casting lines and increase production costs. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide an automatic shell-making line for investment casting, which can conveniently collect casting wax in the shell-making line to save wax.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention provides an automatic shell-making production line for investment casting, comprising a wax mold manufacturing area, a slurry dipping area and a warm water dewaxing area which are connected in sequence by conveyor belts, the warm water dewaxing area being connected with a wax collecting assembly, the wax collecting assembly comprising a box body, a partition being provided in the middle of the box body, the partition dividing the wax collecting box into an upper wax collecting area and a lower hot water area, a recovery chamber being provided in the middle of the wax collecting area, an opening being provided on the open side of the recovery chamber, a leakage hole being provided at the bottom of the recovery chamber and being connected to the hot water area; a condensation plate being provided at the opening, the condensation plate being connected with a rotating drive device, the rotating drive device being capable of driving the condensation plate to move between a condensation position and a scraping position, a scraping assembly being provided in the middle of the recovery chamber, the scraping assembly being capable of scraping wax on the surface of the condensation plate at the scraping position.

[0006] The beneficial effects of the present invention are:

[0007] The water flow line of the present invention can discharge the melted wax in the warm water dewaxing area into the wax collecting assembly for collection by directly arranging a wax collecting assembly on the water flow line, and then return the collected wax to the wax mold manufacturing area for use, so as to facilitate the collection of casting wax in the shell making line to save wax.

[0008] In the wax collection assembly of the present invention, the condensing plate can condense the wax and water solution melted from the warm water dewaxing zone, allowing the wax to adhere to the surface of the condensing plate after solidification. The scraping assembly can scrape the wax on the surface of the condensing plate at the scraping position, allowing the wax on the condensing plate to be scraped off and then collected by the wax collection area, thereby achieving the effect of separating the wax and water for collection. The device of the present invention fully utilizes the low melting point of wax, can facilitate the collection of wax, collect it conveniently and quickly, and improve the efficiency of wax use.

[0009] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0011] Figure 1 It is a structural schematic diagram of the shell making line of the present invention;

[0012] Figure 2 Schematic diagram of the structure of the wax collecting assembly of the present invention;

[0013] Figure 3 A top view of the wax collecting assembly of the present invention;

[0014] Figure 4 is a cross-sectional view of the wax collecting assembly of the present invention;

[0015] Figure 5 Schematic diagram of the arrangement of the condensation plate;

[0016] Figure 6 for Figure 5 Enlarged view at point A;

[0017] Figure 7 is a cross-sectional view of a scraping assembly;

[0018] Figure 8 for Figure 7 Enlarged view at point B;

[0019] Figure 9 It is a schematic diagram of the vertical handle and fan blades;

[0020] Figure 10 for Figure 9 Enlarged view at point C;

[0021] Figure 11 Schematic diagram of the structure of the scraping component.

[0022] The markings in the accompanying drawings are as follows: conveyor belt 1, wax model manufacturing area 2, slurry dipping area 3, warm water dewaxing area 4, wax collecting assembly 5, box body 6, partition 7, wax collecting area 8, hot water area 9, recovery chamber 10, leakage hole 11, condensation plate 12, rotation drive device 13, scraping assembly 14, chassis 15, first motor 16, fan blade 17, bracket 18, scraper 19, slot 20, elastic recovery device 21, threaded hole 22, screw 23, vertical shank 24, T-slot 25, T-shaped protrusion 26, spring 27, inner wall 28, heating end 29, cooling end 30, conduction column 31, bottom plate 32, rotating shaft 33, leakage hole 34, first bevel gear 35, second bevel gear 36, first spur gear 37, second spur gear 38, second motor 39, first pipeline 40, second pipeline 41. DETAILED DESCRIPTION

[0023] like Figures 1 to 11 As shown, an automatic shell-making production line for investment casting includes a wax mold manufacturing area 2, a slurry dipping area 3 and a warm water dewaxing area 4 connected in sequence by a conveyor belt 1. The conveyor belt 1 can be a common belt conveyor belt, or a conventional hoisting conveyor line installed according to a route, which can be transported according to a predetermined route. This device belongs to conventional technology and is not within the scope of protection of this patent. Wax molds are manufactured in batches through the wax mold manufacturing area 2, and the manufactured wax films are transported to the slurry dipping area 3 by the conveyor belt 1. The slurry dipping area 3 is used for slurry dipping, specifically, the outer side of the wax mold is coated with mud and water glass. This is the mud mold. After the mud mold is dried in the slurry dipping area 3, the mud film is placed in the hot water of the warm water dewaxing area 4 to melt the internal wax mold to obtain a shell, and then the casting of the casting is carried out.

[0024] Specifically, as the inventive point of the assembly line of the present invention, the warm water dewaxing zone 4 of the present invention is connected to a wax collecting component 5, which is mainly used to collect a mixture of water and wax obtained from the warm water dewaxing zone 4. The temperature of the mixture is about 90°, and then the wax and hot water are separated to facilitate the reuse of the wax.

[0025] Among them, the wax collecting assembly 5 includes a box body 6, which is cylindrical as a whole and its shape can be changed as needed. A partition 7 is provided in the middle of the box body 6, and the partition 7 divides the wax collecting box into an upper wax collecting area 8 and a lower hot water area 9. To be more precise, the upper side of the partition 7 and the outer side of the recovery chamber 10 are the wax collecting area 8. After the wax collecting area 8 collects solid or liquid wax, it can be discharged through the discharge hole on the box body 6 to facilitate subsequent reuse.

[0026] A recovery chamber 10 is provided in the middle of the wax collection area 8. The recovery chamber 10 is generally quadrilateral, and a quadrilateral opening is provided on the open side of the recovery chamber 10. A leakage hole 11 connected to the hot water area 9 is provided at the bottom of the recovery chamber 10; a condensation plate 12 is provided at the opening, and by continuously passing a water-wax mixture above the condensation plate 12, the condensation plate 12 can condense and bond part of the wax, and the excess hot water or water-wax mixture can enter the hot water area 9 at the lower part of the box body 6 through the leakage hole 11 and can wait for the next collection work. In an embodiment of the present invention, the condensation plate 12 is connected to a rotary drive device 13. The rotary drive device 13 can adopt a conventional drive motor or a drive component that can drive the condensation plate 12 to rotate. The rotary drive device 13 can drive the condensation plate 12 to move between the condensation position and the scraping position to change the condensation state position or the scraping position of the condensation plate 12. When it is in the scraping position, a scraping component 14 is provided in the middle of the recovery chamber 10. The scraping component 14 can scrape the wax on the surface of the condensation plate 12 at the scraping position to achieve the effect of collecting the wax.

[0027] In this embodiment, the scraping assembly 14 includes a chassis 15, a first motor 16 that drives the chassis 15 to rotate, and a plurality of fan blades 17 evenly distributed around the chassis 15; the chassis 15 is generally disc-shaped, and the cross-section of the fan blades 17 is wavy. The fan blades 17 can be fixedly mounted to the chassis 15, and the first motor 16 is connected to the housing 6 through a bracket 18. Each fan blade 17 is connected to a scraper 19, and the scraper 19 extends radially outward along the chassis 15. When the first motor 16 is started, the output shaft of the first motor 16 can drive the chassis 15 to rotate. The rotation of the chassis 15 can simultaneously drive the outer fan blades 17 and scrapers 19 to rotate. The surface of the scraper 19 is in contact with the upper surface of the condensation plate 12, so the wax condensed on the upper surface of the condensation plate 12 can be scraped off. Under the rotation of the scraper 19, the wax can be gradually discharged from the outer edge of the scraper 19, thereby entering the wax collection area 8, which is convenient for subsequent collection work.

[0028] In this embodiment, a slot 20 for mounting the fan blade 17 is provided on the chassis 15. The depth of the slot 20 is arranged vertically. Of course, the shape of the slot 20 can correspond to the shape of the fan blade 17, at least so that the fan blade 17 can move along the depth direction of the slot 20. By controlling the height of the fan blade 17, the height of the scraper 19 corresponding to different fan blades 17 can be controlled. Thus, different scrapers 19 can be allowed to scrape the wax on the condensation plate 12 at different heights, making the scraping process more flexible and reducing the possibility of jamming. Of course, all scrapers 19 can be adjusted to the same height to cope with different scraper 19 installation heights and scraping efficiencies.

[0029] The specific setting method can be that the bottom of the fan blade 17 is connected to the chassis 15 through an elastic recovery device 21. The elastic recovery device 21 can provide an elastic tensioning force for the fan blade 17, so that the fan blade 17 can be elastically attached to the chassis 15 in the vertical direction. Correspondingly, a threaded hole 22 is opened at the bottom of the slot 20, and a screw 23 is connected in the threaded hole 22. Under the prestressed action of the elastic recovery device 21, the end of the screw 23 abuts the bottom of the fan blade 17. The specific control process is that when the fan blade 17 needs to be raised, the screw 23 can be rotated so that the screw 23 moves toward the side where the fan blade 17 is located. The end of the screw 23 can abut the lower end of the fan blade 17, and the fan blade 17 stretches the spring 27 and rises under the movement of the screw 23; when the screw 23 is rotated in the opposite direction, the screw 23 moves back, and the fan blade 17 can move back together under the action of the elastic recovery device 21, facilitating the next movement in the height direction.

[0030] In this embodiment, the scraper 19 is connected to a vertical handle 24, which is a vertically arranged square. The side of the vertical handle 24, that is, the side facing the center of the chassis 15, is provided with a T-slot 25. The outer edge of the fan blade 17 is fixed with a T-shaped protrusion 26 that cooperates with the T-slot 25. The T-shaped protrusion 26 and the T-slot 25 can slide vertically. A spring 27 is also connected between the vertical handle 24 and the fan blade 17, so that the scraper 19 can slide vertically with the vertical handle 24, and the spring 27 can also play the role of elastic connection. Not only can the vertical handle 24 be limited by the setting of the T-slot 25, but the connection function of the spring 27 allows the scraper 19 to elastically give way in the vertical direction, which makes it convenient for the scraper 19 to scrape the wax on the condensation plate 12 from the lower side, and can also reduce the occurrence of jamming.

[0031] In this embodiment, an inclined inner wall 28 is formed on the inner side of the recovery chamber 10, and the inner wall 28 is inclined toward the middle of the recovery chamber 10. When the condensation plate 12 rotates to contact the inner wall 28, it is the condensation position. Because the condensation part of the condensation component is in contact with the inner wall 28 of the recovery chamber 10 at this time, the inner wall 28 can be condensed. The condensation plate 12 is in contact with the inner wall 28, and the condensation effect can be enjoyed at the same time; a condensation component is also provided on the inner side of the recovery chamber 10, and the condensation component includes a semiconductor refrigeration plate and a power supply connected to the semiconductor refrigeration plate. The heating end 29 of the semiconductor refrigeration plate is in contact with the chassis 15, and the cooling end 30 of the semiconductor refrigeration plate is connected to the inner wall 28 through a heat exchange component. By setting up a semiconductor refrigeration sheet, it is easy to condense the inner wall 28. Since the semiconductor refrigeration sheet has two ends, cooling and heating, the cold end is used for cooling, and the hot end can transfer heat to the scraper 19, so that the scraper 19 has a certain temperature. Therefore, the hot end can be used to assist in the scraping of the scraper 19, which can not only improve the efficiency of the device and save energy, but also speed up the scraping efficiency of the scraper 19. At the same time, by setting the semiconductor refrigeration sheet in the middle of the recovery chamber 10, the cooling and heating areas are clearly separated, the structural layout can be compacted, and the mutual influence between the cooling and heating ends 29 can be reduced. Of course, a corresponding heat insulation component can be set in the middle of the box body 6 to reduce the influence of the hot water area 9 below the box body 6 on the upper part.

[0032] In this embodiment, the heat exchange assembly includes a conductive column 31 and a base plate 32. The conductive columns 31 are evenly distributed along the circumference of the base plate 32, and can transfer the condensation effect of the refrigeration plate to the inner wall 28 of the recovery chamber 10, thereby facilitating its cooling. Of course, the shape of the base plate 32 of the present invention can be changed as needed, and it can be provided with a material coating to reduce the thermal impact of the water-wax mixture. The upper end of the conductive column 31 is fixedly connected to the cooling end 30 of the semiconductor refrigeration plate, and the lower end of the conductive column 31 is fixedly connected to the base plate 32. The base plate 32 is fixed to the bottom of the recovery chamber 10.

[0033] In this embodiment, the condensation plate 12 is trapezoidal as a whole, and a rotating shaft 33 is fixed to the long side of the trapezoid of the condensation plate 12. The condensation plate 12 can rotate around the central axis of the rotating shaft 33. The rotating shaft 33 is pivotally connected to the recovery chamber 10. The rotating shaft 33 is also connected to the output end of the rotating drive device 13. A number of water leakage holes 34 are opened on the surface of the condensation plate 12 to facilitate water leakage, thereby facilitating the solidification of the wax.

[0034] In this embodiment, four condensation plates 12 are evenly distributed at the opening of the recovery chamber 10. A first bevel gear 35 is coaxially provided at one end of the rotating shaft 33, and a second bevel gear 36 is coaxially provided at the other end of the rotating shaft 33, which is engaged with the first bevel gear 35 on the adjacent rotating shaft 33. The rotation drive device 13 includes a first spur gear 37, a second spur gear 38 and a second motor 39. The first spur gear 37 is coaxially connected to one of the rotating shafts 33, and the second spur gear 38 is engaged with the first spur gear 37. The second spur gear 38 is driven to rotate by the second motor 39, and the second motor 39 is fixed on the recovery chamber 10. By controlling the four rotating shafts 33 together through the second motor 39, the structure is compacted and the control is more convenient.

[0035] In this embodiment, the warm water dewaxing zone 4 is connected to the box body 6 through a first pipe 40, and the outlet of the first pipe 40 is located directly above the recovery chamber 10; the hot water zone 9 is connected to the wax collecting zone 8 through a second pipe 41, and a circulation pump is provided on the second pipe 41. The outlet of the second pipe 41 is located directly above the recovery chamber 10. The water-wax mixture in the hot water zone 9 can be sucked to the top of the recovery chamber 10 through the circulation pump, and the wax can be collected again, thereby reducing the consumption of wax.

[0036] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An automatic shell production line for investment casting, comprising a wax pattern making area, a slurry dipping area, and a warm water dewaxing area connected in sequence by a conveyor belt, wherein the warm water dewaxing area is connected to a wax collecting assembly, characterized in that: The wax collecting assembly includes a box body, a partition is provided in the middle of the box body, the partition divides the wax collecting box into a wax collecting area on the upper side and a hot water area on the lower side, a recovery chamber is provided in the middle of the wax collecting area, an opening is provided on the open side of the recovery chamber, and a leakage hole connected to the hot water area is provided at the bottom of the recovery chamber; a condensation plate is provided at the opening, and the condensation plate is connected to a rotating drive device, and the rotating drive device can drive the condensation plate to move between the condensation position and the scraping position, and a scraping assembly is provided in the middle of the recovery chamber, and the scraping assembly can scrape the wax on the surface of the condensation plate at the scraping position; the scraping assembly includes a chassis, a first motor that drives the chassis to rotate, and a plurality of fans evenly distributed around the chassis. Blade; the first motor is connected to the box body through a bracket, and each fan blade is connected to a scraper, and the scraper extends outward along the radial direction of the chassis; a slot for mounting the fan blade is provided on the chassis, and the fan blade can move along the depth direction of the slot, and the bottom of the fan blade is connected to the chassis through an elastic recovery device, and a threaded hole is provided at the bottom of the slot, and a screw is connected in the threaded hole. Under the prestressed action of the elastic recovery device, the end of the screw abuts against the bottom of the fan blade; the scraper is connected to a vertical knife handle, and a T-slot is provided on the side of the vertical knife handle. A T-shaped protrusion that cooperates with the T-slot is fixed on the outer edge of the fan blade, and the scraper can slide vertically along with the vertical knife handle. A spring is also connected between the handle and the fan blades; an inclined inner wall is formed on the inner side of the recovery chamber, and the position when the condensation plate rotates to contact the inner wall is the condensation position; a condensation component is also provided on the inner side of the recovery chamber, and the condensation component includes a semiconductor refrigeration plate and a power supply connected to the semiconductor refrigeration plate, the heating end of the semiconductor refrigeration plate is in contact with the chassis, and the cooling end of the semiconductor refrigeration plate is connected to the inner wall through a heat exchange component; the heat exchange component includes a conduction column and a bottom plate, the conduction columns are evenly distributed along the circumference of the bottom plate, the upper end of the conduction column is fixedly connected to the cooling end of the semiconductor refrigeration plate, the lower end of the conduction column is fixedly connected to the bottom plate, and the bottom plate is fixed to the bottom of the recovery chamber. ; The condensation plate is trapezoidal as a whole, and a rotating shaft is fixed to the long side of the condensation plate, and the rotating shaft is pivotally connected to the recovery chamber. The rotating shaft is also connected to the output end of the rotation drive device, and a number of water leakage holes are opened on the surface of the condensation plate; four condensation plates are evenly distributed at the opening of the recovery chamber, and a first bevel gear is coaxially arranged at one end of the rotating shaft, and a second bevel gear is coaxially arranged at the other end of the rotating shaft, which is meshed with the first bevel gear on the adjacent rotating shaft. The rotation drive device includes a first spur gear, a second spur gear and a second motor, the first spur gear is coaxially connected to one of the rotating shafts, the second spur gear is meshed with the first spur gear, and the second spur gear is driven to rotate by the second motor, and the second motor is fixed on the recovery chamber.

2. The automatic shell production line for investment casting according to claim 1, characterized in that: The warm water dewaxing area is connected to the box through a first pipe, and the outlet of the first pipe is located directly above the recovery chamber; the hot water area is connected to the wax collecting area through a second pipe, a circulation pump is provided on the second pipe, and the outlet of the second pipe is located directly above the recovery chamber.

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